<template>
	<view class="u-wrap">
		<u-swiper :list="list" mode="none" class="u-skeleton-fillet"></u-swiper>
		<view class="u-menu-wrap">
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view " :scroll-top="scrollTop"
			 :scroll-into-view="itemId">
				<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item" :class="[current == index ? 'u-tab-item-active' : '']"
				 @tap.stop="swichMenu(index)" style="position: relative;">
					<text class="u-line-1">{{item.name}}</text>
					<!-- <u-badge type="error" :count="item.count" :offest="[15,15]"></u-badge> -->
					<uniBadge :text="item.count" v-show="item.count > 0" type="error" size="small" style="position: absolute;top: 8rpx;right: 8rpx;"></uniBadge>
				</view>
			</scroll-view>
			<scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="right-box " @scroll="rightScroll"
			 style="background-color: rgb(244,244,244);">
				<view class="page-view">
					<view class="class-item" :id="'item' + index" v-for="(item , index) in tabbar" :key="index">
						<view class="item-title">
							<u-sticky :offset-top="offTop" :z-index="index + 100" v-if="index === 0">
								<view class="amin" style="font-size: large;background-color: white;padding: 8px;">{{title}}</view>
							</u-sticky>
							<view v-else class="amin" style="font-size: large;background-color: white;padding: 8px;">{{item.name}}</view>
						</view>
						<view class="item-container" style="background-color: white;">
							<cardItem v-if="item.loading" :list="item.foods" :index="index" :imgUrl="imgUrl" style="width: 100%;" @mounted="categoryMounted"
							 @numPlus="numPlus" @numMinus="numMinus" @imgClick="previewImg"></cardItem>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
		<view class="navigation" style="z-index: 999;">
			<view class="left">
				<view class="item car" @click="redirctToList">
					<u-icon name="order" :size="40"></u-icon>
					<view class="text u-line-1">历史订单</view>
				</view>
				<view class="item car" @click="orderPopup">
					<u-badge class="car-num" :count="count" type="error" :offset="[-3, -6]"></u-badge>
					<u-icon name="list-dot" :size="40" :color="$u.color['contentColor']"></u-icon>
					<view class="text u-line-1">已选菜品</view>
				</view>
			</view>
			<view class="right">
				<u-button type="warning" shape="square" :disabled="count == 0" @click="submit">选好了</u-button>
			</view>
		</view>
		<u-popup v-model="orderShow" height="75%" mode="bottom" border-radius="20" z-index="800">
			<view style="text-align: right;padding: 16px; color: gray;">
				<span @click="clearAll()">
					<u-icon name="trash"></u-icon>清空
				</span>
			</view>
			<scroll-view scroll-y="true" style="height: 75%;">
				<view style="padding: 5%;height: 100%;">
					<view v-for="(item,index) in tabbar" :key="index" v-show="item.count > 0" style="margin-top: 10px;">
						<view style="width: 100%;display: flex;position: relative;" v-for="(item1,index1) in item.foods" :key="index1"
						 v-if="item1.num > 0">
							<view class="card-left" style="width: 25%;margin-left: 2%;margin-right: 8%;">
								<u-image :src="imgUrl+'ys-'+item1.picture" mode="widthFix" :lazy-load="true"></u-image>
							</view>
							<view class="card-right" style="width: 65%;">
								<view class="title">{{item1.name}}</view>
								<view class="absolute" style="right: 5px;bottom: 5px;">
									<u-number-box :min="0" @plus="numPlus" @minus="numMinus" :index="index" v-model="item1.num" style="float: right;" />
								</view>
							</view>
						</view>
					</view>
				</view>
			</scroll-view>
		</u-popup>
		<u-toast ref="uToast" />
	</view>
</template>
<script>
	import cardItem from '@/compoents/cardItem'
	import uniBadge from '@/compoents/uni-badge.vue'
	import {
		categoryQueryAll,
		flavorQueryAll,
		placeQueryAll,
		getBannerList
	} from '@/api/common.js'
	
	export default {
		data() {
			return {
				title: getApp().globalData.foodsList[0].name,
				scrollTop: 0, //tab标题的滚动条位置
				oldScrollTop: 0,
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				itemId: '', // 栏目右边scroll-view用于滚动的id
				tabbar: getApp().globalData.foodsList,
				menuItemPos: [],
				arr: [],
				scrollRightTop: 0, // 右边栏目scroll-view的滚动条高度
				timer: null, // 定时器
				imgUrl: getApp().globalData.baseImgurl,
				isLogin: false,
				count: getApp().globalData.count,
				orderList: [],
				list: getApp().globalData.bannerList,
				orderDetail: null,
				orderShow: false,
				addMeal: false,
				offTop: 0,
				firstItemTop: 0,
				maskImage: ''
			}
		},
		components: {
			cardItem,
			uniBadge
		},
		onLoad(e) {
			console.log("menu onLoad")
			if (e === null) {
				return
			}
			if (e.addMeal === 'true') {
				this.addMeal = true
			} else {
				this.orderDetail = JSON.parse((decodeURIComponent(e.param)))
			}
			// getBannerList().then(res => {
			// 	that.list = res.data.map(item => {
			// 		return that.imgUrl + '/' + item
			// 	})

			// }).catch(res => {

			// })
		},
		onReady() {
			console.log("menu onReady")
			let that = this
			// this.getMenuItemTop()

			let info = uni.createSelectorQuery().select(".amin").boundingClientRect()

			info.exec(function(res) {
				let top = res[0].top
				that.offTop = top / uni.getSystemInfoSync().windowWidth * 750
			})
			that.tabbar.forEach(item => {
				item.loading = true
			})
		},
		onShow() {
			 this.count = getApp().globalData.count
		},
		methods: {
			// 点击左边的栏目切换
			async swichMenu(index) {
				let that = this
				if (this.arr[index] === undefined) {
					setTimeout(function(){
						that.swichMenu(index)
					},500);
					return
				}

				if (index == this.current) return;
				this.scrollRightTop = this.oldScrollTop;
				this.$nextTick(function() {
					this.scrollRightTop = this.arr[index] + 10;
					this.current = index;
					this.leftMenuStatus(index);
				})

			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({
						size: true
					}, res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if (!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return;
						}
						this[dataVal] = res.height;
						resolve();
					}).exec();
				})
			},
			// 观测元素相交状态
			async observer() {
				this.tabbar.map((val, index) => {
					let observer = uni.createIntersectionObserver(this);
					// 检测右边scroll-view的id为itemxx的元素与right-box的相交状态
					// 如果跟.right-box底部相交，就动态设置左边栏目的活动状态
					observer.relativeTo('.right-box', {
						top: 0
					}).observe('#item' + index, res => {
						if (res.intersectionRatio > 0) {
							let id = res.id.substring(4);
							this.leftMenuStatus(id);
						}
					})
				})
			},
			// 设置左边菜单的滚动状态
			async leftMenuStatus(index) {
				this.current = index;
				// 如果为0，意味着尚未初始化
				if (this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},

			async rightScroll(e) {
				this.oldScrollTop = e.detail.scrollTop;
				if (this.arr.length == 0) {
					await this.getMenuItemTop();
				}
				if (this.timer) return;
				if (!this.menuHeight) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
				}
				setTimeout(() => { // 节流
					this.timer = null;
					// scrollHeight为右边菜单垂直中点位置
					// let scrollHeight = e.detail.scrollTop + this.menuHeight / 2;
					let scrollHeight = e.detail.scrollTop;
					for (let i = 0; i < this.arr.length; i++) {
						let height1 = this.arr[i];
						let height2 = this.arr[i + 1];
						// 如果不存在height2，意味着数据循环已经到了最后一个，设置左边菜单为最后一项即可
						if (!height2 || scrollHeight >= height1 && scrollHeight < height2) {
							this.leftMenuStatus(i);
							return;
						}
					}
				}, 10)
			},
			orderPopup() {
				if (this.count > 0) {
					this.orderShow = !this.orderShow
				} else {
					this.$refs.uToast.show({
						title: '购物车为空',
						type: 'warning',
					})
				}
			},
			numPlus(categoryIndex, foodsIndex) {
				this.tabbar[categoryIndex].count++
				this.tabbar[categoryIndex].foods[foodsIndex].num++
				this.count++
				getApp().globalData.count++
			},
			numMinus(categoryIndex, foodsIndex) {
				this.tabbar[categoryIndex].count--
				this.tabbar[categoryIndex].foods[foodsIndex].num--
				this.count--
				getApp().globalData.count--
			},
			categoryMounted(categoryIndex) {
				let that = this
				
				let selectorQuery = uni.createSelectorQuery();
				
				selectorQuery.selectAll(".class-item").boundingClientRect(res=>{
					// console.log(categoryIndex,res)
					let top = res[0].top
					if (categoryIndex === 0) {
						that.arr.push(0);
						return
					}else{
						
						that.arr.push(res[categoryIndex].top - top );
						if (categoryIndex === that.tabbar.length - 1) {
							that.loading = false
						}
					}
				}).exec()
				
				// selectorQuery.select('#item' + categoryIndex).boundingClientRect((rects) => {
				// 	if (categoryIndex === 0) {
				// 		that.firstItemTop = rects.top
				// 		that.arr.push(0);
				// 		return
				// 	}
					
				// 	that.arr.push(rects.top - that.firstItemTop );
				// 	debugger
				// 	if (categoryIndex === that.tabbar.length - 1) {
				// 		that.loading = false
				// 	}
				// }).exec()
			},
			redirctToList() {
				uni.navigateTo({
					url: "../orderHistory/orderHistory"
				})

			},
			submit() {
				let array = []
				let that = this
				this.tabbar.forEach(item => {
					if (item.count > 0) {
						item.foods.forEach(item1 => {
							if (item1.num > 0) {
								array.push(item1)
							}
						})
					}
				})

				if (this.addMeal) {

					let addMealOrderDeatil = getApp().globalData.addMealOrderDeatil;
					
					getApp().globalData.orderDetail = {
						id: addMealOrderDeatil.id,
						date: addMealOrderDeatil.mealTime,
						timestamp: addMealOrderDeatil.mealTime,
						num: addMealOrderDeatil.num,
						place: addMealOrderDeatil.place.id,
						placeName: addMealOrderDeatil.place.place,
						flavor: addMealOrderDeatil.flavor.id,
						flavorName: addMealOrderDeatil.flavor.flavor,
						foodsNum: that.count,
						remark: addMealOrderDeatil.remark,
						orderList: array,
						mealType: addMealOrderDeatil.mealType
					}
					uni.navigateTo({
						url: '../orderCheck/orderCheck?addMeal=1'
					});
					return
				}

				let time = that.orderDetail.time
				getApp().globalData.orderDetail = {
					date: that.orderDetail.date,
					timestamp: time,
					num: that.orderDetail.num,
					place: that.orderDetail.place,
					placeName: that.orderDetail.placeName,
					flavor: that.orderDetail.flavor,
					flavorName: that.orderDetail.flavorName,
					foodsNum: that.count,
					remark: that.orderDetail.remark,
					orderList: array,
					mealType:that.orderDetail.mealType
				}

				uni.navigateTo({
					url: '../orderCheck/orderCheck?addMeal=0'
				});

			},
			previewImg(e) {
				uni.previewImage({
					urls: [e],
					indicator: 'none'
				})

			},
			clearAll() {
				getApp().globalData.count = 0
				getApp().globalData.foodsList.forEach(item => {
					if (item.count > 0) {
						item.count = 0
						item.foods.forEach(item1 => {
							item1.num = 0
						})
					}

				})
				this.count = 0
				this.tabbar.forEach(item => {
					if (item.count > 0) {
						item.count = 0
						item.foods.forEach(item1 => {
							item1.num = 0
						})
					}
				})
				this.orderShow = false
			}
		},
		mounted() {
		
		},
		watch: {
			current: function(newVal, oldVal) {
				this.title = this.tabbar[newVal].name
			}
		}
	}
</script>

<style lang="scss" scoped>
	.warp {
		display: flex;
		align-items: center;
		justify-content: center;
		height: 100%;
	}

	.u-size-mini {
		padding: 5rpx 5rpx !important;
	}

	.u-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}


	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color: $u-tips-color;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}

	.u-tab-item-active {
		// position: relative;
		color: #000;
		font-size: 30rpx;
		font-weight: 600;
		background: #fff;
		border-left: 4px solid $u-type-primary;
	}



	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: rgb(200, 200, 200);
	}

	.page-view {
		// padding: 16rpx;
	}

	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		// padding: 16rpx;
		border-radius: 8rpx;
	}

	.item-title {
		font-size: 26rpx;
		color: $u-main-color;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: $u-main-color;
	}



	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}

	.u-tab-item-active {
		// position: relative;
		color: #000;
		font-size: 30rpx;
		font-weight: 600;
		background: #fff;
		border-left: 4px solid $u-type-primary;
	}

	// .u-tab-item-active::before {
	// 	content: "";
	// 	position: absolute;
	// 	border-left: 4px solid $u-type-primary;
	// 	height: 32rpx;
	// 	left: 0;
	// 	top: 39rpx;
	// }

	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: rgb(250, 250, 250);
	}

	.page-view {
		// padding: 16rpx;
	}

	.class-item {
		background-color: #fff;
		// padding: 0 16rpx;
		padding-bottom: 30rpx;
		border-radius: 8rpx;
	}

	.class-item:last-child {
		min-height: 100vh;
	}

	.item-title {
		font-size: 26rpx;
		color: $u-main-color;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: $u-main-color;
	}

	.item-container {
		display: flex;
		flex-wrap: wrap;
		padding: 0 16px;
	}


	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}

	.thumb-box {
		width: 100%;
		display: flex;
		// align-items: center;
		// justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}

	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}

	.display-flex {
		margin-top: 10rpx;
		display: flex;
	}

	.card-left {
		width: 33.33%;
		height: 170rpx;
	}

	.card-right {
		margin-left: 3%;
		width: 63.66%;

	}

	.title {
		font-weight: bold;
		font-size: 30rpx;

	}

	.description {
		display: -webkit-box !important;
		overflow: hidden !important;
		text-overflow: ellipsis !important;
		word-break: break-all !important;
		-webkit-box-orient: vertical !important;
		-webkit-line-clamp: 2 !important;

	}

	.navigation {
		display: flex;
		border: solid 2rpx #f2f2f2;
		background-color: #ffffff;
		padding: 16rpx 0;

		.left {
			width: 60%;
			display: flex;
			// padding-left: 10%;
			// padding-right: 10%;
			font-size: 20rpx;

			.item {
				margin: 0 30rpx;

				&.car {
					text-align: center;
					position: relative;

					.car-num {
						position: absolute;
						top: -10rpx;
						right: -10rpx;
					}
				}
			}
		}

		.right {
			width: 40%;
			display: flex;
			font-size: 28rpx;
			padding-left: 10%;
			padding-right: 10%;
			align-items: center;

			.btn {
				line-height: 66rpx;
				padding: 0 30rpx;
				border-radius: 36rpx;
				color: #ffffff;
			}

			.cart {
				background-color: #ed3f14;
				margin-right: 30rpx;
			}

			.buy {
				width: 100%;
				background-color: #ff7900;
			}
		}
	}

	.marginTop {
		margin-top: 15rpx;
	}

	.absolute {

		position: absolute;
		right: 0;
		bottom: 0;
	}

	.hidden {
		opacity: 0;
	}
</style>
